Stopping-off. pouring gate, &c., the mould is now complete, and will, no doubt,. be admitted as economically made. Of course this method will serve only when a large number of castings are required of the same kind. BOTTOM BOX Stopping-off is a process which often serves to utilise a pattern temporarily for a slightly different purpose to that first intended, and so to effect economy, A simple example will suffice. In Fig. 73^, a pipe pattern with flanges is shewn; we will suppose a shorter bend is required. All that is necessary is to %fix a flange on at A, and provide a. stopping-off piece B of the same size as the flange, having a print attached for the core. c represents a plan of the mould, with the stopping-off piece in position; the portion D being filled up by the moulder. The rest of the moulding will be easily understood.